Pythoscope 0.2.2 released

This release contains both bug fixes and new features. Our recent development focused on answering a question "how can I use Pythoscope continuously"? As a form of an answer, from now on Pythoscope analyzes test modules and uses this information to avoid generating duplicate test cases. It can also safely append new test cases to existing ones, without overwriting any modifications a user may have made so far.

Please note that this release is not backwards-compatible in regards to .pythoscope file, so be sure to remove any old .pythoscope files generated by 0.2.1 or earlier before using the new version.